I want to cut my own hair im black and have waves?andis master vs wahl?

tired of paying barbers for haircuts ...push back my line sometimes or cut my hair too low. last week i bought the andis t ouliner and im looking into buying some clippers so i was wondering sholud i drop spend the money on the andis master(more money) which is pretty much the standard in all black barbershops or go for a wahl which i understand is a respectable clipper but may not be as good. ill still have to learnt to cut though but ive ben watching alot youtube videos and i thin im goingto be capable. i know someone who uses a wahl and his hair looks good